Figure 5.

DEP capture at different concentrations. (a) The kinetic DEP capture curves when AC voltage is turned on and off with Bacteriophage T4r concentration at the normal concentration (5×10⁹ pfu·ml⁻¹) and two diluted concentrations (5.5×10⁸ and 2.5×10⁷ pfu·ml⁻¹). (b) The kinetic curve of DEP capture with a very low concentration (8.9×10⁴ pfu·ml⁻¹) of Bacteriophage T1 flow above the 200 μm × 200 μm active NEA area at 0.87 mm·sec⁻¹. The captured virus particles are well separated from each other and thus can be precisely counted. (c) and (d) are representative snapshots from the video with the AC voltage off and on, respectively. The flowing virus particles in solution are seen as streaks while the captured ones are focused bright spots. The AC voltage is fixed at 10 kHz and 10 V_pp in this set of experiments.